Weighing mechanism



Oct. 12 1926.

H. L. MERRICK WEIGHING MECHANISM Filed Feb. 1919 5 Sheets-Sheet 1 WITNESS 1 7 ATT HEY Oct. 12 1926. 1,602,831 H. L. MERRICK WEIGHING MECHANISM Filed F 1919 3 Sheets-Sheet 2 WITNESS INVENTOR I #L/ /ERH CK 1,602,831 H. L. MERRICK WEIGHING MECHANISM Filed Feb. 18. 1919 alga s Sheets-Sheet 5 III/ll ////////I////// ///l ////l l/l/l/Il/ WITNESS I INVENTOR H. L ,Msmwc/r ATT NEY Patented Oct. 12, 1926.

PATENT OFFICE.

HERBERT L. MERRICK, OF PASSAIC, NEW JERSEY.

WEIGHING MECHANISM.

Application filed February 18, 1919.

This invention relates to weighin mech anism in which the weight of aload placed upon a load receiver or lati'orm is counterbalanced by counterpoise weight upon a scale beam, and it is an object of the invention to provide weighing mechanism of this character in which counterpoise weight is automatically applied tothe scale beam to counterbalance a load on the receiver, and the scale beam relieved of such counterpoise weight when the load is removed from the load receiver.

Itis a further object of the invention to provide in weighing mechanism of this character dial mechanism to indicate the weight of a load upon the load receiver, comprising a pointer to indicate upon a primary or unit dial the weight of loads upon t e load receiver within a predetermined limit, and a supplemental or multiple unit dial to co-operate with the unit dial to indicate the weight of loads upon the receiver greater than such predetermined weight and within the capacity of the weighing mechanism, said indicating mechanism being operable from the weighing mechanism by the placing of a load upon the load receiver.

It is another object of the invention to provide weighing mechanism of this character in which the weighing of loads on the receiver within a predetern'iined weight are automatically weighed and the weight of the load indicated upon dial mechanism, and in which counterpoise weight is automatically applied to the weighing mechanism when loads greater than such predetermined weight are placed upon the load receiver, and the weight of such loads indicated on the dial mechanism, without the necessity of any manual operation whatever.

In the drawings accompanying and forming a part of this specification, Figure 1 is a front elevation of a weighing mechanism illustrating an embodiment of my invention and showin the parts in normal no load position an with the front of the casing enclosing the same removed.

Figure 2 is a view similar to Figure 1 but showing the position of the parts when a load greater than a predetermined weight is placed on the load receiver.

Figure 3 is a sectional side elevation taken substantially on the line 3-3 of Figure Serial No. 277,732.

1, looking in the direction of the arrow; and

Figure 4 is a front elevation of dial mechanism upon which to indicate the weight 01 a load on the load receiver.

Similar characters of reference designate like parts throughout the different views of the drawings.

The embodiment of my invention shown in the drawings comprises a casing U in which the operative parts of the weighing mechanism are enclosed. Pivotally supported in said casing as by a bracket 6 is a scale-beam to which is connected at one side oi its fulcrum support a weighing lever 8 by a link 9 arranged with a. cup 10 for counterbalance weight. By means of a draft rod 11 there is connected to or suspended from the weighing lever a load receiver or platform supported by suitable levers as usual (not shown). The end of the lever opposite to its connection with the scale-beam is connected to one end of and supported by a suspender 12, in the. form of a sprocket chain passing over a rotatable sprocket wheel 18 and a pulley 1 1, and said floating or movable support for the weighing lever is maintained in a predetermined position with no load on the receiver, or a load with a predetermined weight thereon, by a counterweight 15 connected to the end of the Suspender opposite to its connection with the weighing lever. I

To counterbalance and weigh a load on the load receiver within a predetermined weight there is connected to the scale-beam a counterpoise weight 16 carried by a downwardly extending arm 17, in the form of a pendulum, secured to the scale-beam in line with the pivotal support of the same. To assure the scalebeam and fulcrum being in balance due to the support of the weighing mechanism being out of level or otherwise there is provided a supplemental counterweight 18 carried by an arm 19 secured to a lever pivotally supported at one end, as at 21, and the opposite end adjustably connected to the scale-beam at a point forward of its pivotal support, as at 22. These weights 16 and 18 have adjusting means 23 and 24.

The weight of the load on the receiver is rod 11 to the weighing lever 8 pulling down the right hand end of said lev r, and this movemem of the lever causes the right hand end 01 the scale-beam through the linl; to d: ct a like amount. The torque oi such uciiccting' movement or force is about the la crum of the scale-heam, and is counterhalanced by the primary pendulum weight it and the i7:;iliary or compensating weight 19, and this condition will prevail when the load upon the receiver is within a predetermined weight. The weight ot a load within such predetermined weight is indicated by a pointer 28 on a lined grad uated dial it; exposed through an opening in the casing which is closed by a 'ihis dial is herein termed a primary dial and is ot a capacity to indicate the veight of. a load upon the receiver up to two hundred (200) pounds.

The pointer or indicator is actuated through the deflecting movements of the SCZIlG bGfilll. the load is placed upon the load receiver and thereby the left hand end oi the scale-beam raised the pointe is moved around the dial by a toothed racl: at tl upper end of a vertical rod 30 carried hv scale-beam meshing with a pinion rotatahly supported in a supporting bracket 32 for the dial and to which the pointer 28 is tired to participate in the rotary movement of the pinion.

When a load greater than the dial capacity is placed on the load receiver the pointer is moved beyond the last graduation on the f' the movement of the scale-beam and glass 27.

during this movement of the scale-beam a pin 32 carried thereby, and engaging in slot in a trig 33 connected to a pivotaily supported pawl 3 t, engages with the upper wall of said slot 'iliOlf-Olf lifting said pawl from a ratchet wheel 35 rota'ahle with the sprocket wheel 13 releasing said wheel permitting the load on the receiver to pull 'he fulcrum end of the weigh lever 8 downward against th action of the count-en weight 15. During i movement of the lever and suspender 12 trarne 36 sup ported to have sliding vertical movcn upon rods 38 and connected to the suspeno. 12 is ca ised to participate in the movem ct said Suspender. lhis frame carries a series of countcrpoise weights 37 to co-operat with the weight 15 to normally ma'ntain the lever 8 in equilibrium. The counterpoise weights 3? have central pertoratio in superposed relation. A rod 31:7 suspendc?- from the scale-beam passes through the central perforations in the counte oise weights 3? and has a series or seat-s e0 axed thereto 1 seats being so spaced ant hat the countcrpoise weights wil cessivel transferrech ieginniir uppermost weighh from the carr cin is and thereby applied to tie q 1 dlitli 36 to said sea scale-beam. There are nine of the counterpoise weights 3? each of which has the same value as the capacity oi the dial 226 so that the total weighing capacity of the weighing mechanism is ten times the initial capacity of the primary rial 2G. )is the counterpoise weight carrier descents the weights are consecutively and automatically deposited upon the rod seats all) in such nuinher until the left hand end of the StftiGdJLWdl is depressed and until the overweight is neitralized by the corresponding deer" in the combined effect oi the opposed heain primary and compensating A due to the descent of the scale-beam, the the latter descending sulllciently to release the pawl to cause it to again eng ge the ratchet wheel 35 and thereby ct-am thev counterpoise weight ca'rier a rust movemcnt when the pointer will again he in position in the gradiated portion of the dial. and indicate the weight of the load on the receiver.

iaiinultaneously with the foregoing described downward movement of the counterpo'se weight carrier :1 weighted rod veia'hts ing upon said carrier will move dewz'rrari ard during such movement said I'Jtl will crate to intermittently rotate a supplei dial ll", herein termed the multiple unitd al through a pin and slot connection t: with one end of a pivotal v supported lever to and connected at the op s'te end as at l6, with said multiple unit dial l7. The dial has indices or ligures thereon to be exposed through open i s i. fixed dial 26 i1 conjunction with the graduzr tions on s" id latter dial. The increment ot noveme it of the rod is counterpoise weight 3? is sears all) the multiple unit I.

ve oredeteriniued to the run arcs 21115 causing one successive unit multrole to be exoosed through the dial Ultl'il l c. l.

ings 4S.

on i receiver ind recorded the receiver, and thus the right hand of the weighing: lever re eved of the pull of such load, the scale nu will move its original p "ion of rest and the counterweight 1:3 which is no longer excelled lrv the pull of the weight of the load on the Suspender through the weig ling lever moves the left hand end of the weighing}; lever v ward and with it the carrier tor the couu fcu poise weights, the latter being automatically taken or piclied up by the carrier 'i'r rod seats it), when tie mechanism in in condition to a l? anothc lOiil. to prevent vibration of the pointer 28 thr ugh movement of the scale-beam there is provided a shock absorber 50 which is in of a dash pot, the plunger of the nature 'liul lltl which is connected by a rod 51 to the scalebeam. To prevent vibration of the multiple unit dial there is provided a second dash pot 52 the plunger of which is connected to the counterpoise weight carrying trmne by a rod 53.

To take the tare of trucks or contain as for articles being weighed there is provided a supplemental graduated scale-beam which is carried by studs 55 projecting forward from the scale-beam 7 and through slots in the casing so that the supplemental scale beam 54 will occupy a position in a recessed portion 56 of the casing, said beam having a counterpoise weight 57 adjust-- ably mounted thereon.

Having thus described my invention, I claim:

1. In weighing mechanism, the eombina tion of a scale-beam; a weighing lever connected to the scale beam arranged to support a load; a movable support for said lever; a seriesof auxiliary counterpoiseweights con nected to the lever support and normally free of the weighing mechanism; counterpoise wei ht connected to the beam operative to bring the beam into equilibrium with a load supported by the. lever within a predetermined weight: means carried by the scale beam arranged in operative relation to the auxiliary counterpoise weights on the lever support adapted to transfer said counterpoise weights automatically as successive increments from the lever support to the scale beam when the load supported by the lever exceeds such predetermined weight for the purpose specified.

2. In a weighing scale, the combination of a weighing lever arranged for connection of a load support; a scale beam to which the lever is operatively connected at one end; counterpoise weight to co-operate with the' beam to counterbalance the load supported by the weighing lever within a predetermined weight; movable means including a counterweight to suspend the lever from the end opposite to its connection with the scale beam; means to control the movement of said lever suspension means governed by the scale beam; and auxiliary counter oise weights normally free of the scale eam when weighing a load within said predetermined weight and adapted to be automatically applied to the scale beam by the movement of the lever suspension means when a load exceeds such predetermined weight.

3. In a weighing scale, the combination of. a weighing lever arranged to support a load; a scale beam connected to the weighing lever arranged with counter-poise weight operative to counterbalance a load within a predetermined weight; a movable support for said lever; means governed by the scale beam to control the movement of the lever support; means operative from the beam to indicate the weight of the load within said predetermined weight; auxiliary counter poise weight connected to the lever support; and means operative to transfer the auxiliary counterpoise weight from the lever support to the beam through the action of the lever and beam when the load exceeds such determined weight and indicate such e): cessive weight.

at. In a weighing scale, a scale beam; a weighing lever connected to the scale beam and arranged to suspend a load receiver therefrom; primary counterpoise arranged on said beam to counterbalance a load within a predetermined weight; an adjustable suspender to one end of which the lever connected and having a counterweight con nected to the opposite end; means to control the movement of said lever suspension means governed by the scale beam; a carrier for a series of counterpoise weights connected to said suspender to participate in the movement thereof; and means carried by the beam to which the counterpoise weights are successively transferred when the load e5:- ceeds sucn predetermined weight and from which the counterpoise weights are transferred to their carrier by a reduction in the load.

5. In a weighing scale, a scale-beam; a weighing lever connected to the scale-beam and arranged to suspend a load receiver therefrom; a suspender to one end of which the lever is connected and having a counterweight connected to the opposite end; a rotatable support for the suspender arranged to be held against movement when the weight on the load receiver is within predetermined limits and means to release the support when the load on the receiver exceeds such predetermined weight for the purpose specified.

G. In weighing mechanism, a scale beam; a weighing lever connected to the scale beam having means to support a load therefron'r and to co-operate wi h the scale beam to weigh a load within a predetermined weight; a dial; means operable from the weigl'iing mechanism to indicate the weight of such load on the dial; auxiliary counterpoise weight carried by the support for the lever normally free of the weighing mechanism; means carried by the scale beam to automatically take up the auxiliary counterpoise weight to counterlnilance a load in excess of such predetermined weight; and means operable from the lever to indicate such excessive load on the dial.

7. In weighing mechanism, a lever having means to support a load; a scale beam to which the lever is connected having counterpoise weight operatively connected thereto to automatically counterbalance a load within a predetermined weight; means with which the scale beam co-operates to indicate lit) the of such load; a series of counterpo se hts n,rn ally suppor ed by the le'er ort "free or the weighing mechani" 1 cans connected to the scale beam arr; L15 automatically and successively "poise weights when the edetermined weight and poise weights to their weighing mechanism is load; and means opever to indicate such excess t'on with the wei 'ht oi the weig tire (Min -n1 nn l i camper illirw'er ng mechanisnn a weighing su )port a load; a niovabl e lever arranged with mean t e lever arranged with i s weight to counterbalance a load within a pr determiner a carrier for an;iliar counterpois w conneci'cc to and movable with the support; 2- means under the control o the beam govern the movement lever suppo t. and carrier said carri operative when the load e' eeds terinined weight to automatinthe au arv connterpoise we carrier to the beam and talte up such countorpoise weight from the beam when the eel-- c 2 id is removed.

9. weirhino mechanism. a weighing lever arranged to support a load to be weighed; a beam connected to the lever; a

inovaoic support for the lever; yielding means connected to the support to resist the ment thereof; means under the control 7 the beam to govern the movement of said let P support; c.nd counterpoise weight norv carried by ad movable with the lever nged to be autoi'nar whei load is support and nto'i ver support means support counterpoise l 7 independent or? he beam connected have movement theretransiter said counter- .mht to the beam vxnen a load is apli d to the lever aid Li support for the coun .9 weight is moved in one dire tion 1in the lever support to counterbalance load supported by the lever and transfer said counterpoise weight from the beam to its support as counterpoise support is moved in opposite direction with tie lever support as the load is removed.

11. In a weighing scale, a scale-beam; a weighing lever connected to the scale beam and arranged to support a load; a suspender to one end of which the lever is connected; a counterweight connected to the other end oi the suspender; a rotatable support for the suspender; means under control of the beam to govern the movement of the support; a veight carrier connected to the Suspender at the side of its support at which the lever is connected to the suspender to have movement therewith; and a car ier for said weights connected to the scale-beam, said carrier being ar'anged whereby during the movement of the lever suspender the weights will be automatically t'ansferred from one carrier to the other in accordance with the weight or" the load.

12. In a weighing scale, a scale-bean1; a weighing lever connected to the scale-beam and arranged to have load receiver connected thereto; a suspender to one end of which the l ver is connected to support the lever; a movable support for the suspender: 2- counter weight connected to the Aid of i re suspender opposite to the lever I jted to lllOY the lever to a predetermined positioi with no load on the receiver; l'GiOflSill'llU means to co-operate with the Suspender support to iornially maintain the suspender support om movement and thereby retain the susg rder in said latter position said means being relersable under the control. of the scale beam when the load on the receiver exceeds a predetermined weight for the purpose specified.

13. In a weighing scale, a scaleearn; a weighing lever connected to the sale-beani and arranged to have a load receiver connected thereto; a suspender to one end of which the lever is connected to support the lever; a rotatable support for the suspendcr: a. counterweight connected to the end oi the suspendcr opposite to the lever adapted to move the lever to a predetermined position with no load on the receiver; a ratchet wheel rotatable with the SHSlJ-GlltlGi support; and a pawl under the control of the beam to co-operate with the atchetwheel to normally hold thesupport from movement with the counterweight and lever in no load posi tion said pawl being releasable from the ratchet wheel when the load on the receiver exceeds a predet rinined weight for the purpose specified.

1%. In a weighing 55"t1l0, a scale-beaing a weighing lev r connected the scalebeain and ar un ted to have a load receiver connected thereto; a suspender to one end of which the lever is connected to support the lever; a rotatable support for the suspender; a counterweight connected to the end of the suspender opposite to the lever to move the lever to a predetermined position with no load on the receiver; and pawl and ratchet moaesi mechanism to normally hold the lever support in said, latter position, said pawl being releasable from the ratchet mechanism by the scale-beam when the load on the receiverexceeds a predetermined weight for the purpose specified.

15. In a weighing scale, a scale-beam; a weighing lever connected to the scale-beam and arranged to have a load receiver connected thereto; a suspender to one end oi which the lever is connected to support the lever; a movable support for the suspender; a counterweight connected to the end of the suspender opposite to the lever adapted to move the lever to a predetermined no load position; releasable means under control of the scale-beam to co-operate with the suspender support to normally hold the support from movement and retain the suspender in said latter position, said means being releasable when the load exceeds a predetermined weight; a slidably supported counterpoise weight carrier adapted to participate in the movement of the suspender support; means suspended from the scale-beam coaxially with the counterpoise weight, said counterpoise weight carrier being arranged to apply said weights to said means suspended from the scale-beam when the lever suspender moves in one direction and take up said counterpoise weight when the lever suspender moves in the opposite direction for the purpose specified.

16. In a weighing scale, a scale-beam; a weighing lever connected to thescale-beam and arranged to have a load receiver connected thereto; a suspender to one end-of which the lever is connected to be supported thereby to have downward and upward mo ement; a rotatable support for the suspender; a counterweight connected to the other end of the suspender adapted to move the suspender and thereby the lever to a predetermined position with no load on the receiver; means to retain the rotatable support in such position releasable by the scale-beam when the load on the receiver exceeds a predetermined weight; a slidably supported carrier for a series of superposed counterpoise Weights perforated centrally thereof, said carrier being arranged to have participating movement with the lever suspender; a rod suspended from the scale-beam to extend through the perforations in the counterpoise weights and having variably spaced seats thereon to which the counterpoise weights are successively applied from the carrier during the downward movement thereof with the suspender, and to successively take up said counterpoise weights during the upward movement of the carrier with the suspender for the purpose specified.

17. In a weighing scale, a scale-beam; a weighin lever connected to the scale-beam arrange to support a load; a support for the weighing lever arranged to permit of the lever to have downward and upward movement in accordancewith a load supported thereby greater than a predetermined weight; a series of counterpoise weights and a carrier therefor arranged to have participating movement with the lever support, and adapted to automatically apply said counterpoise weights successively to the scale-beam in accordance with the increase of the loadbeyond a predetermined weight, and to automatically take up said counteroise weights from the scale-beam when the load is removed from the lever; means con trolled by the movement ofthe scale-beam to control the movement of the carrier for the counterpoise weight; a fixed dial; a pointer operableto indicate the load within a predetermined weight; a rotatable dial; and an operative connection between said latter dial and the carrier for the counterpoise weights to intermittently advance the rotatable d al and arranged to successively expose units thereon in relation to the fixed dial with the increase in the weight of the load for the purpose specified.

18. In a weighing scale, a scale-beam, a weighing lever connected to the scale-beam and arranged to have a load receiver connected thereto; a series of counterpoise weights; a carrier therefor connected to the lever arranged to automatically apply the counterpoise weights successively to the scale-beam when the load on the receiver exceeds a predetermined weight; means under control of the scale beam to govern the movement of the carrier; a fixed dial; a rotatably supported pointer operable from the scale-beam to indicate the weight of the load on the receiver within a predetermined weight; a rotatable dial juxtaposed to the fixed dial and an operative connection between the rotatable dial and the carrier for the counterpoise weights to intermittently advance said rotatable dial to suecessively expose units thereon in relation to the fixed dial to indicate the weight of loads on the receiver greater than such predetermined weight.

19. In weighing mechanism, the combination of load supporting means; primary counterpoise means to which the load sup porting means is connected to counterbalance loads within a predetermined weight; auxiliary counterpoise weight normally free of the primary counterpoise means; and means under the control of the load supporting means and primary counterpoise means operative to automatically transfer the auxiliary counterpoise weight to the primary counterpoise means when the load exceeds such predetermined weight to countel-balance such excessive weight.

20. In weighing mechanism, the combination of load supporting means; primary cemiterneise means to which the load. sn

porti means is connected to counterbalance leads Within a predetermined Weight; weight norn ally i? the primary counterpeise means; an J the load exceeds such predetermined weight to connterhalance such excessive Weight.

21 In weighing: mechanism, the combination of leac supporting means; primer nose means to which the loacl sun coir-aectei to cennterhala predetermined weig t;

1 i'noise n Weight nei'inal to inclicaie the "Weight of leads within such precleterininec Weight; means under the control of the load siipporting" inea 1S and primer connterpo se means autoinetiealy operative to transfer the auxiliary connterpoise Veight to the prim r3 counterpoise means when the load ({LiGOilS such predetermined Weight to counterbalance such excessive Weight; and means to indicate the weight of loads in e of said predetermined weight in min on with the indication of lead Wli'il in said predetermined Weight.

22. In Weighing neehanisin the e0nibination 01": load sup 'ioi-tin r means; priinanv ceenterpoise means '0 which t-heloacl suppecring 111311118 connected to eoiinterhalance lends Vithin a piecleternined Weight; c giliary connterpoise weieht normally free of the primary conniiei'poise means; n'ieans iillflQI" the control of the lead supporting anl rimary connternoiie means tive to auto icellj' transfer the anxiliary counterpoise Weight to the priinar eonnterpoise means when the load exceeds such predetermined Weight to counterbalan such excess: e weight: and aclnistnhle cennterpoise Weight coacting with the pri- 

